Major gearbox oil into transmission

Timcla

New User
Hi
My 16 year son has got a 1956 major to learn all about tractors,he s done a good job on it up to now but has noticed the seals on the trumpets are leaking milky oil and the gearbox oil has dropped considerably.
I m guessing it s leaking into transmission oil tank but how many seals can it leak through and is there a way of fixing it without splitting the tractor as that may be too much for his knowledge.
I ve been told it is probably the pot seal but not sure how to identify or fix this and then was told it could be gearbox seal which is more involved.
Can you drain the transmission fluid so level drops then keep topping up with gearbox oil or will this problem need fixing ASAP.
He was hoping to show it in a show in June and is afraid to drive it in case things get a lot worse.
I m no mechanic and my lads 16 but would welcome any advice you can offer.many thanks.
 
If memory serves me correctly, there are two places where transmission gear oil can transfer to the differential. The PTO drive, which is located at the bottom of the transmission, or the seal which separates the transmission from the differential at the pinion.The PTO seal can be changed without splitting the tractor. Not so lucky with the pinion. Check Yesterdays Tractor Manuals to see if there is a service manual available.

For a temporary solution, there is a fitting on the Three Point Hitch control valve that can be used to install a hydraulic hose that will allow differential oil to be transferred back to the transmission through the transmission filler port. A ball valve or similar will need to be installed on the hose, otherwise gear oil will shoot out the end of the hose whenever the three point is used. Simply take the cap off the transmission filler port, put one end of the hose in it, open the ball valve and activate the three point lift.
 

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